Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 24: Spin Transport and Orbitronics, Spin-Hall Effects

MA 24.11: Vortrag

Mittwoch, 7. September 2022, 17:30–17:45, H37

Non-Collinear Spin Current for Switching of Chiral Magnetic Textures — •Dongwook Go^1,2, Moritz Sallermann^1,3, Fabian R. Lux², Stefan Blügel¹, Olena Gomonay², and Yuriy Mokrousov^1,2 — ¹Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany — ²Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany — ³Science Institute and Faculty of Physical Sciences, University of Iceland, VR-III, 107 Reykjavík, Iceland

We propose a concept of non-collinear spin current, whose spin polarization varies in space even in non-magnetic crystals. While it is commonly assumed that the spin polarization of the spin Hall current is uniform, asymmetric local crystal potential generally allows the spin polarization to be non-collinear in space. Based on microscopic considerations we demonstrate that such non-collinear spin Hall currents can be observed for example in layered Kagome Mn₃X (X = Ge, Sn) compounds. Moreover, by referring to atomistic spin dynamics simulations we show that non-collinear spin currents can be used to switch the chiral spin texture of Mn₃X in a deterministic way even in the absence of an external magnetic field. Our theoretical prediction can be readily tested in experiments, which will open a novel route toward electric control of complex spin structures in non-collinear antiferromagnets. Reference: Go et al. arXiv:2201.11476